Immune System
Which of the following proteins would not need localization signal?

A protein bound to the endoplasmic reticulum (ER) membrane
A cytosolic protein
A cell surface protein
A nuclear protein

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Immune System
Which of the following is correct for isoantigens?

They are antigens found in all members of a species
They are antigens found in some members of different species
They are antigens found in all members of different species
They are antigens found in some members of a species

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Immune System
The role of the M cell is to

they use their cilia to propel mucus out of the small intestine
pass bacteria or virus to underlying macrophages for processing and presentation of antigen
induce apoptosis in virus-infected small intestinal epithelia cells
trap virus in mucus and prevent entry

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